That was our ruleset from the DEFL all the way through the Great Lakes. Here are some interesting things for you ponder:
You will not use tall receivers or rookie bases. There is a huge risk for fumbles when hit from the side with a wide TTC.
Clarifying the actual fumble. Was he falling before contact? Things like that.
I think the dice work fine, they are clear, but should only be on contact.
I am saying this knowing that I cause tons of contact fumbles with my speedy safeties. I just like using rookie bases for something other than kick and punt coverage. Trust me, they won't be around in mass if that rule is adopted.
http://www.youtube.com/user/Treks111#p/u/20/fu9ewMDtwaE
Second play, what a hit! This was three years ago though.